last year, mr. harper completed a 50-mile bike race in 4 hours 20 minutes. this year he would like to complete the same race in 4 hours. how many miles per hour should mr. harper cover in order to complete the bike race in 4 hours? [d-r] s a 14.5 miles per hour b 13.5 miles per hour c 12.5 miles per hour d 11.5 miles per hour
Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?